IGCSE biology notes on human nutrition should map nutrients → sources → deficiency diseases and summarise digestive enzymes by region of the gut.

Hub: IGCSE biology notes · Human nutrition exam tips · Past paper topic.

Notes layout

Block	Details
Nutrients	CHO, fat, protein, vitamins, minerals, fibre, water
Digestive system	Label diagram; enzyme table
Small intestine	Villus structure — large surface area
Assimilation vs absorption	Definitions in margin

Frequently asked questions

Villus diagram from memory?

High-yield — practise weekly with annotated diagrams guidance.

Bile and lipase?

Include roles in fat digestion on same page.

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